JP2001111345A - Oscillator and radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute an oscillator for simplifying the adjustment and design of a connecting part with an NRD guide, and for suppressing an unnecessary mode, and for simplifying miniaturization and radio equipment using this oscillator. SOLUTION: An oscillator circuit is constituted by providing a line 7, a Gunn diode 6, and a dielectric oscillator 16 on a dielectric substrate 3, and a dielectric strip 5 is arranged between upper and lower conductive boards 1 and 2 so that an NRD guide as a transmission line for an output can be constituted, and the line 7 is connected with the NRD guide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave or millimeter wave oscillator provided with an oscillation circuit using a Gunn diode or the like and an output transmission line for outputting an oscillation signal, and uses the oscillator. The present invention relates to a wireless device.

[0002]

2. Description of the Related Art Conventionally, in a microwave band or millimeter wave band oscillator using a negative resistance element such as a Gunn diode,
Japanese Patent Application Laid-Open Nos. Hei 6-268445 and Hei 9-205324 disclose using a negative resistance element such as a Gandhi diode and a dielectric resonator as a dielectric transmission line as an output transmission line.
No.

If such a dielectric line is used as an output transmission line, a high-efficiency oscillator can be constructed by utilizing its low loss characteristics.

[0004]

However, in the conventional oscillator described above, since the strip line and the dielectric line are coupled by a three-dimensional arrangement, the length of the strip line and the open end are reduced. The degree of coupling changes depending on the position. For this reason, it has been difficult to couple the dielectric waveguide (hereinafter, referred to as “NRD guide”) and the dielectric resonator in a positional relationship that provides an optimal phase. In addition, there is a problem that since the left-right symmetry is broken at the joint between the strip line and the NRD guide, an unnecessary electromagnetic field mode is easily generated.

In the conventional oscillators described above and above, it is necessary to secure a space for disposing the dielectric resonator in a space between the upper and lower conductor plates, which is a cutoff region of the NRD guide. This is disadvantageous for miniaturization.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned various problems, to facilitate adjustment and design of a coupling portion with an NRD guide, to suppress an unnecessary mode, and to reduce the size of an oscillator. It is to provide a wireless device used.

[0007]

An oscillator according to the present invention comprises an oscillating circuit formed on a dielectric substrate, and an output transmission line for transmitting the oscillating output signal, and a conductor pattern is formed on the dielectric substrate. A line by connecting a negative resistance element to the line, disposing a dielectric resonator near the line on the dielectric substrate, and coupling the dielectric resonator to the line,
The line is coupled to the output transmission line between the connection position of the negative resistance element of the line and the coupling position of the dielectric resonator.

In the oscillator according to the present invention, the output transmission line is a dielectric line in which a dielectric strip is disposed between two substantially parallel conductor plates.

In the oscillator according to the present invention, when the wavelength on the line is λg, the length of the line from the connection position of the negative resistance element to a nearby end is λg / 4 + N ₁ × λg / 2.
(Where N ₁ is an integer of 0 or more), and the length from the connection position of the negative resistance element to the coupling position of the output transmission line is N ₂ × λ
g / 2 (N ₂ is an integer of 0 or more), and the length from the coupling position of the output transmission line to the coupling position of the dielectric resonator is N ₃ × λg / 2 (N ₃ is an integer of 0 or more). And

In the oscillator according to the present invention, the dielectric resonator is configured by providing an electrode having an opening on another dielectric substrate laminated on the dielectric substrate.

In the oscillator according to the present invention, a sub-line coupled to the dielectric resonator is provided on the dielectric substrate, a variable reactance element is connected to the sub-line, and a line for supplying a control voltage to the variable reactance element is provided. Is provided.

In the oscillator according to the present invention, the output transmission line includes a dielectric member between two substantially parallel conductor surfaces.
A transmission line having a cutoff characteristic, and a cutoff frequency of the transmission line is used to cut off a fundamental wave component or a fundamental wave component and a lower harmonic component of an oscillation signal by the oscillation circuit, and propagate a higher harmonic component therefrom. It is decided to make it.

An oscillator according to the present invention includes a terminal that is weakly coupled to a line of the oscillation circuit.

In the oscillator according to the present invention, the output line may include:
A dielectric line is formed by arranging a dielectric strip between two substantially parallel conductor plates, a slot is formed in one of the conductor plates, and the dielectric substrate is arranged outside the conductor plate. The line and the dielectric line are coupled.

In the oscillator according to the present invention, the dielectric substrate is housed in a case, and the bias line is provided with a wide line portion and a narrow line portion, and the dielectric line is provided near the narrow line width portion. A spring is provided for fixing the plate to the inner surface of the case.

A wireless device according to the present invention is configured using any one of the oscillators described above.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an oscillator according to a first embodiment will be described with reference to FIGS. FIG. 1A shows
FIG. 4B is a plan view of the oscillator having the upper and lower conductor plates with the upper conductor plate removed, and FIGS. 4B and 4C are respectively BB and CC in FIG. 3A with the upper conductor plate provided. It is sectional drawing of a part. In FIG. 1, 1 is a lower conductor plate, 2
Is an upper conductor plate, which constitutes an oscillator in a space sandwiched between the upper and lower conductor plates. Reference numerals 3 and 4 in the figure denote dielectric substrates, respectively. A line 7 for an oscillation circuit is provided on the upper surface of the dielectric substrate 3, and a gun diode 6 is provided at a predetermined position.
Are connected. The gun diode 6 is of a pill package type, is mounted on the lower conductor plate 1, has its protruding electrode inserted through a hole formed in the dielectric substrate 3, and solders the electrode of the gun diode to the line 7 by soldering or the like. Electrically connected.

A bias line 8 for supplying a bias voltage to the Gunn diode 6 is formed on the upper surface of the dielectric substrate 3, and a stub 8 'is provided at a predetermined position. The variable reactance element 12 is mounted on the upper surface of the dielectric substrate 3 between the sub-line 27 and the ground. In addition, the line 7 and the sub line 27
The dielectric resonator 16 is mounted so that a part of the dielectric resonator 16 is applied.

On the upper surface of the dielectric substrate 4, a line 13 for supplying a control voltage to the variable reactance element 12 is formed, and a stub 13 'is formed at a predetermined position.

In FIG. 1, reference numeral 5 denotes a dielectric strip, and a groove having a width of the dielectric strip 5 is formed at a predetermined position on the upper and lower conductor plates 1 and 2, and the dielectric strip 5 is formed along the groove. Has been arranged. The dielectric strip 5 and the upper and lower conductor plates 1 and 2 constitute a non-radiative dielectric line (hereinafter referred to as “NRD guide”). In particular,
In this example, the distance between the upper and lower conductor plates in the space portions on both sides of the dielectric strip 5 is made narrower than the distance between the upper and lower conductor plates in the dielectric strip 5 to prevent the LSE01 mode from propagating.
It acts as a non-radiative dielectric line that is adapted to propagate a single mode of the M01 mode.

The dielectric substrate 3 has a line 7 provided on its upper surface.
Are oriented in a direction perpendicular to the axial direction of the dielectric strip 5 and parallel to the upper and lower conductor plates, so that the dielectric strip 5 is located between the connection position of the Gunn diode 6 and the coupling position of the dielectric resonator 16. Has been placed. As a result, the mode of the suspended line formed by the line 7 and the upper and lower conductor plates is magnetically coupled to the LSM01 mode of the dielectric line.

FIG. 2 is a circuit diagram showing a configuration of the oscillation circuit portion shown in FIG. One end of the line 7 is resistance-terminated with a terminating resistor 17 and the other end is open. 1 on track 7
When the wavelength is represented by λg, in this example, since the impedance of the Gunn diode 6 is as low as several Ω, the position of λg / 4 + N ₁ × λg / 2 from one open end of the line 7, that is, equivalently substantially short-circuited The Gunn diode 6 is connected to the position of the point to achieve impedance matching.

The variable reactance element 12 has a sub-line 27
Is connected to a position of approximately λg / 4 from the open end of the. The dielectric resonator 16 is coupled to predetermined positions of the line 7 and the sub line 27, respectively. This dielectric resonator 16
Is made of a cylindrical dielectric and is used as a TE01δ mode resonator.

The dielectric strip 5 of the NRD guide is located at a position of N ₂ × λg / 2 from the connection position of the Gunn diode 6 and at a position of N ₃ × λg / N from the coupling position of the dielectric resonator 16.
The position 2 is equivalently approximated to the position of the short-circuit point. Therefore, the NR at the place where the magnetic field strength of the line 7 is high is
Magnetically coupled with the D guide, and the NR
The mode is converted to the DSM LSM01 mode with a strong coupling coefficient. With the above configuration, the oscillation signal is transmitted via the NRD guide.

The stub 8 'shown in FIG. 1 is provided at an interval of approximately 1/4 wavelength on the bias line from the connection position of the Gunn diode 6, ie, equivalently, the position of the substantially short-circuit point. Therefore, the impedance Z as viewed from the gun diode 6 side to the bias power supply side becomes high impedance, and the stub 8 'acts as a trap. Thereby, the oscillation signal does not leak to the bias power supply side via the bias line, and the modulation characteristics and the oscillation efficiency are improved.
Similarly, the stub 13 'shown in FIG. 1 is provided at an interval of 1/4 wavelength from the equivalent short-circuit point of the sub-line 27. Therefore, the oscillation characteristic does not leak to the control voltage supply line 13 side, and the modulation characteristics and the oscillation efficiency are improved.

FIG. 3 is a diagram showing a configuration near the end of the line 7 shown in FIG. A pattern of a terminating resistor 17 is formed at the end of the line 7, and a stub 18 is further formed ahead of the pattern. The length (5) from the connection position of the stub 18 to the terminating resistor 17 to the end and the width (6) of the end are each set to be approximately 1/4 wavelength on the line. Since the stub 18 is a so-called open stub, the connection position between the terminating resistor 17 and the stub is equivalent to a short-circuit point, and the end of the line 7 is grounded via the terminating resistor 17.

As described above, the dielectric resonator is not coupled to the dielectric strip of the NRD guide, but is coupled to the strip line of the oscillation circuit.
There is no need to secure a space for installing the dielectric resonator in the cut-off region of the NRD guide, and the entire device can be downsized. In addition, the left-right symmetry is not broken at the coupling portion of the NRD guide to the line 7, and an unnecessary mode does not occur. Further, since the dielectric substrate constituting the oscillation circuit can be arranged in parallel with the conductor plate of the NRD guide, that is, it is not necessary to arrange the line of the resonance circuit and the NRD guide three-dimensionally. The NRD guide and the dielectric resonator can be coupled in an optimal phase relationship without changing the degree of coupling with the NRD guide depending on the length or the position of the open end.

Next, the configuration of the oscillator according to the second embodiment will be described with reference to FIG. In the first embodiment, a TE01δ mode resonator made of a cylindrical dielectric is used. In the second embodiment, a resonator is formed on a dielectric substrate.

FIG. 4A is a perspective view of a main part of the resonator.
(B) is a perspective view showing a configuration of a main part of the resonance substrate,
(C) is a cross section of the main part. As shown in FIG. 4, a resonance substrate 19 is superposed on the lower surface of the dielectric substrate 3 constituting the oscillation circuit. As shown in (B), the resonance substrate 19 is provided with electrodes having circular electrode non-forming portions facing each other on both surfaces of a dielectric substrate. The region of the dielectric substrate sandwiched between the non-electrode-formed portions acts as a TE010-mode dielectric resonator. The electrode non-formed portion of the resonance substrate 19 is (C)
As shown in the figure, by arranging it near the line 7,
The resonator is coupled to the line 7.

The configuration of the oscillation circuit for the dielectric substrate 3 and its line 7 and the NR including the dielectric strip 5
The structure of the connection portion with the D guide is the same as that of the first embodiment.

Next, the configuration of the oscillator according to the third embodiment will be described with reference to FIGS. In the third embodiment, the structure is basically the same as the structure shown in the first embodiment, but a multiplying oscillator is used.

FIG. 5 is a plan view of the oscillator having the upper and lower conductor plates with the upper conductor plate removed. Unlike the oscillator shown in FIG. 1, in the third embodiment, the cutoff frequency of the NRD guide by the dielectric strip 5 and the upper and lower conductor plates 1 and 2 cuts the fundamental wave component of the oscillation signal by the oscillation circuit, A frequency component higher than the second harmonic is propagated. For example, when the fundamental oscillation frequency of the Gunn diode 6 is 38 GHz, its second harmonic, 76
GHz is transmitted by the NRD guide.

Unlike the embodiment shown in FIG. 1, the bias line 8 has a stub 9 for harmonics and a stub 1 for fundamental waves.
0 is provided. FIG. 6 is a diagram showing the configuration of that part. The stub 9 is provided at a position (1) away from the position of the gun diode 6, and the length from the connection point to the bias line 8 to the open end is (2). The stub 10 is provided at a position (3) away from the position of the gun diode 6, and the length from the connection point to the bias line 8 to the open end is (4). In the above (1), the wavelength of the second harmonic on the bias line is substantially 1/4 wavelength from the connection position of the Gunn diode, that is, the position of the substantially short-circuit point.
(2) is the wavelength of the second harmonic, which is approximately 1/4 wavelength. Also,
In the above (3), the wavelength of the fundamental wave on the bias line is approximately 1/4 wavelength from the connection position of the Gunn diode, that is, the position of the substantially short-circuit point equivalently. (4) is the wavelength of the fundamental wave, approximately 1 /
4 wavelengths. However, the length (3) from the short-circuit point to the connection position of the stub 10 is affected by the stub 9 (the above (1) and
(2) length).

Therefore, the impedance Z seen from A toward the bias power supply side becomes a high impedance (ideally a point of infinite impedance on the Smith chart) at the fundamental frequency and the frequency of the second harmonic, and the stub 9 is 2 The stub 10, which traps the higher harmonic component, acts as a trap for the fundamental component. Thereby, the oscillation signal does not leak to the bias power supply side via the bias line, and the modulation characteristics and the oscillation efficiency are improved.

A stub similar to the above two stubs is also provided on the control voltage supply line 13 as shown in FIG. The stub 14 is connected to a position １ ／ wavelength away from the equivalent short-circuit point of the variable reactance element stub 11 at the wavelength of the second harmonic and the length from the connection point to the open end is the wavelength of the second harmonic. Is 1/4 wavelength. Also, stub 1
Numeral 5 is connected to a position separated from the equivalent short-circuit point of the variable reactance element stub 11 by 1/4 wavelength in the wavelength of the fundamental wave, and the length from the connection point to the open end is 1/4 in the wavelength of the fundamental wave.
Wavelength. Therefore, the oscillation characteristic does not leak to the control voltage supply line 13 side, and the modulation characteristics and the oscillation efficiency are improved.

Next, the configuration of an oscillator according to the fourth embodiment is shown in FIG. FIG. 7 is a plan view with the upper conductor plate removed. Unlike the example shown in FIG. 1, the electrode 21 and the adjustment terminal 20 connected thereto are provided on the dielectric substrate 3.
Is provided. Further, in this example, no structure for changing the frequency by voltage control is provided.

In FIG. 7, the electrode 21 is weakly coupled to the line 7 and an oscillation signal can be monitored by connecting a spectrum analyzer or the like to the adjustment terminal 20. For example, when adjusting the oscillation frequency, the fundamental frequency is １ ／ of the actually used second harmonic frequency.
Is trimmed on one open end T of the line 7 so that

As described above, since the electrode 21 is only weakly coupled to the line 7, there is no other adverse effect.
Since the fundamental wave component is weakly coupled to the unblocked line 7 and the oscillation signal is monitored, the frequency of the fundamental wave that is lower than the oscillation frequency output to the NRD guide can be measured. It is possible to use a spectrum analyzer.

As described in the first embodiment and the like,
A variable reactance element is provided so that the oscillation frequency can be voltage-controlled, the oscillation frequency is detected from the signal extracted by the adjustment terminal, and feedback is applied to the control voltage so that the specified frequency is obtained. You may make it stabilize.

Next, the configuration of the oscillator according to the fifth embodiment will be described with reference to FIG. In the first to fourth embodiments, the dielectric substrate 3 is provided in the space sandwiched by the upper and lower conductor plates. In the fifth embodiment, the dielectric substrate 3 is disposed outside the upper and lower conductor plates. I do. That is, the upper conductor plate 2
A slot 22 is formed along the longitudinal direction of the dielectric strip 5, and the dielectric substrate 3 is arranged so that the line 7 of the oscillation circuit is orthogonal to the slot 22. The structure of the dielectric substrate 3 is basically the same as that shown in FIG. 1 or FIG. However, the mode of the microstrip line (substantially TEM mode) propagating on the line 7 of the oscillation circuit and the LSM mode of the dielectric line are magnetically coupled via the slot 22. At this time, the magnetic field in the TEM mode is
2, the magnetic field of the LSM mode hardly leaks from the slot 22 to the dielectric substrate 3 side. Therefore, one-way coupling is performed from the line 7 to the NRD guide. According to such a configuration, even if the reflected wave at the discontinuous portion of the NRD guide returns to the Gunn diode side,
The signal level is suppressed. Moreover, since the NRD guide does not propagate the fundamental wave component, the signal returning to the Gunn diode 6 does not include the fundamental wave component. for that reason,
The effect on the oscillation characteristics is extremely small.

Next, the configuration of the oscillator according to the sixth embodiment will be described with reference to FIG. FIG. 9A is a plan view of the oscillation circuit portion with the upper conductor plate removed, and FIG. 9B is a cross-sectional view taken along a plane perpendicular to the bias line with the upper conductor plate provided. In this example, the bias line 8 is formed with a repetitive pattern of a portion w having a large line width and a portion n having a small line width, thereby having a low-pass filter characteristic of blocking an oscillation signal component. Then, a concave spring 23 is provided in a narrow path portion indicated by n. This concave spring 23
In a state where the dielectric substrate 3 is arranged in a space formed between the upper and lower conductor plates 1 and 2, the dielectric substrate 3 is disposed in a space between the dielectric substrate 3 and the upper conductor plate 2. To the lower conductor plate 1
Press to the side. Therefore, even if the dielectric substrate 3 is slightly warped, the dielectric substrate 3 is securely fixed in the space formed by the upper and lower conductor plates, and stable frequency characteristics can be obtained.

Since the concave spring is provided in the narrow portion of the bias line, the concave spring does not conduct to the bias line, and this portion is a portion where the bias line equivalently acts as an inductor. Has almost no effect on the bias line.

Next, an example of the configuration of a millimeter wave radar will be described as an embodiment of a wireless device with reference to FIG. In FIG. 10, the VCO is the oscillator shown in the first embodiment. This VCO frequency-modulates, for example, a triangular wave signal provided from a signal processing circuit, and outputs an oscillation signal. This oscillation output signal is transmitted to the primary radiator via the isolator → coupler → circulator. This gives 1
The secondary radiator transmits a millimeter wave signal with a predetermined beam width via a dielectric lens or the like. The coupler provides a part of the transmission signal to the mixer as a local signal. 1 reflected wave from object
Upon entering the secondary radiator, the received signal is provided to the mixer via a circulator. The mixer mixes the received signal from the circulator and the local signal to generate an intermediate frequency signal. The IF amplifier amplifies the intermediate frequency signal and supplies the amplified signal to the signal processing circuit. The signal processing circuit detects the distance to the object and the relative speed of the object from the modulated signal and the IF signal given to the VCO.

Although a pill type gun diode is used in the embodiment, a surface mount type gun diode may be mounted on a dielectric substrate. Further, a three-terminal element such as an FET may be used as the negative resistance element in addition to the Gunn diode. For example, when a MOS-FET is used, a line for coupling to the NRD guide is connected to the drain, a resonance line is connected to the source, and a bias line is connected to the gate.

In the embodiment, the fundamental wave is 38 GHz.
Band gun diode, the second harmonic of 7
Although an oscillation signal in the 6 GHz band is obtained, the cut-off frequency is set to be equal to the second harmonic so that a higher harmonic component higher than the third harmonic is transmitted to the output transmission line depending on the purpose.
You may make it determine between the next harmonics.

Further, in the embodiment, the line 7 of the oscillation circuit provided on the dielectric substrate 3 is brought close to the end of the dielectric strip 5 so that the coupling between the lines is achieved. May be divided into upper and lower portions in a plane parallel to the conductor plate, and a dielectric substrate may be arranged between the dielectric strips on the upper and lower sides to couple the line of the oscillation circuit and the NRD guide.

[0047]

According to the first aspect of the present invention, since the dielectric resonator is mounted on the dielectric substrate constituting the oscillator circuit, the dielectric is provided in the space between the upper and lower conductor plates, which is the cut-off region of the NRD guide. There is no need to secure space for arranging the body resonator, and the entire device can be reduced in size. Further, the positioning of the dielectric resonator is facilitated, and required characteristics are easily obtained.

According to the second aspect of the present invention, the connection between the line and the dielectric line by the conductor pattern of the oscillation circuit is facilitated, and the loss accompanying the mode conversion can be reduced. In addition, the symmetry between the left and right is not broken at the joint, and an unnecessary electromagnetic field mode is not generated.

According to the third aspect of the present invention, it is possible to easily match the line of the oscillation circuit with the low impedance negative resistance element, and to strongly couple the line of the oscillation circuit with the dielectric line. And loss due to mode conversion can be reduced, and high efficiency can be achieved.

According to the fourth aspect of the present invention, even when the resonator constituted by the resonance substrate is coupled to the line of the oscillation circuit, the reduction of the no-load Q is small, so that the phase noise is reduced. Play.

According to the fifth aspect of the invention, the oscillation frequency can be made variable by the control voltage, and can be used as a voltage controlled oscillator.

According to the sixth aspect of the present invention, it is possible to easily obtain a high-frequency signal which is difficult to oscillate directly. In addition, since an oscillation circuit is formed using a dielectric substrate, and an output transmission line including a dielectric material portion is used between two substantially parallel conductor surfaces, unlike the case where a hollow waveguide is used, The size is small, the adjustment of the resonance frequency is easy, the mass production is suitable, and the cost can be reduced. In addition, since the fundamental wave component or low-order harmonic is reliably blocked by the output transmission line, and only the harmonic component to be used is transmitted, the harmonic signal to be used is not attenuated. No loss occurs.

According to the seventh aspect of the present invention, it is possible to monitor a fundamental frequency signal lower than the frequency to be used without adversely affecting the oscillation circuit. it can.

According to the eighth aspect of the invention, the return signal from the dielectric line to the oscillation circuit is suppressed, and the fundamental frequency signal does not return, so that stable oscillation characteristics can be obtained.

According to the ninth aspect, variation in characteristics due to deformation of the dielectric substrate is suppressed, and stable characteristics are obtained.

According to the tenth aspect of the present invention, it is possible to obtain a small, low-loss, high-gain millimeter-wave radar as a whole.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an oscillator according to a first embodiment.

FIG. 2 is a diagram showing a relationship between a line of an oscillation circuit and a connection position of a Gunn diode and the like in the oscillator.

FIG. 3 is a diagram showing a partial configuration of a line of an oscillation circuit in the oscillator.

FIG. 4 is a diagram showing a configuration of an oscillator according to a second embodiment.

FIG. 5 is a diagram showing a configuration of an oscillator according to a third embodiment.

FIG. 6 is a diagram showing a configuration of a bias line of the oscillator.

FIG. 7 is a diagram showing a configuration of an oscillator according to a fourth embodiment.

FIG. 8 is a perspective view showing a configuration of an oscillator according to a fifth embodiment.

FIG. 9 is a diagram showing a configuration of an oscillator according to a sixth embodiment.

FIG. 10 is a block diagram showing a configuration of a millimeter wave radar according to a seventh embodiment.

[Explanation of symbols]

 1-Lower conductor plate 2-Upper conductor plate 3,4-Dielectric substrate 5-Dielectric strip 6-Gun diode 7-Line 8-Bias line 8 'stub 9-Stub for harmonics 10-Stub for fundamental wave 12- Variable reactance element 13-Control voltage supply line 13 'stub 14-Harmonic stub 15-Fundamental stub 16-Dielectric resonator 17-Terminal resistor 18-Stub 19-Resonant substrate 20-Adjustment terminal 21-Electrode 22-slot 23-concave spring 27-sub line

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H03B 7/14 H03B 7/14 (72) Inventor Toru Tanizaki 2-26-10 Tenjin, Tenjin, Nagaokakyo-shi, Kyoto Stock Company Murata Manufacturing Co., Ltd. (72) Inventor Koichi Sakamoto 2-26-10 Tenjin, Nagaokakyo City, Kyoto Pref. GG02 JJ14 JJ15 KK02 KK09 KK22 LL07 MM01 MM07 MM09

Claims (10)

[Claims] An oscillator comprising: an oscillation circuit formed on a dielectric substrate; and an output transmission line for transmitting an oscillation output signal of the oscillation circuit, wherein a line formed by a conductor pattern is formed on the dielectric substrate. A negative resistance element is connected to the line, a dielectric resonator is arranged near the line on the dielectric substrate, and the dielectric resonator is coupled to the line, and the negative resistance element of the line is An oscillator comprising the line coupled to the output transmission line between a connection position of the dielectric resonator and a coupling position of the dielectric resonator. 2. The oscillator according to claim 1, wherein the output transmission line is a dielectric line in which a dielectric strip is disposed between two substantially parallel conductor plates. 3. Assuming that the wavelength on the line is λg, the length of the line from the connection position of the negative resistance element to a nearby end is substantially λg / 4 + N ₁ × λg / 2 (N ₁ Is an integer of 0 or more), and the length from the connection position of the negative resistance element to the connection position of the output transmission line is approximately N ₂ × λg.
/ 2 (N ₂ is an integer of 0 or more), and the length from the coupling position of the output transmission line to the coupling position of the dielectric resonator is approximately N ₃ × λg / 2 (N ₃ is an integer of 0 or more) The oscillator according to claim 1 or 2, wherein 4. The oscillator according to claim 1, wherein said dielectric resonator is formed by providing an electrode having an opening on another dielectric substrate laminated on said dielectric substrate. 5. A sub-line coupled to the dielectric resonator is provided on the dielectric substrate, a variable reactance element is connected to the sub-line, and a line for supplying a control voltage to the variable reactance element is provided. Item 5. The oscillator according to any one of Items 1 to 4. 6. The output transmission line is a transmission line having a cutoff characteristic including a dielectric material portion between two substantially parallel conductor surfaces, and a cutoff frequency of the transmission line is determined by an oscillation signal generated by the oscillation circuit. The oscillator according to any one of claims 1 to 5, wherein the oscillator is set so as to block a fundamental wave component or a fundamental wave component and a lower harmonic component, and propagate a higher harmonic component. 7. The oscillator according to claim 1, further comprising a terminal that is weakly coupled to a line of the oscillation circuit. 8. A line of the oscillation circuit and the dielectric line, wherein a slot is formed in one of the two substantially parallel conductive plates, and the dielectric substrate is disposed outside the conductive plate. The oscillator according to any one of claims 2 to 7, wherein 9. A method for accommodating the dielectric substrate in a case, providing the bias line with a wide line portion and a narrow line portion, and disposing the dielectric substrate near the narrow line width portion. 9. The oscillator according to claim 1, further comprising a spring fixed to an inner surface of the oscillator. 10. A wireless device using the oscillator according to claim 1.